Chemistry of vanadium chlorides in molten salts: An electronic absorption spectroscopy study / Polovov I.B., Volkovich V.A., Shipulin S.A., Maslov S.V., Khokhryakov A.A., Vasin B.D., Griffiths T.R., Thied R.C. // Journal of Molecular Liquids. - 2003. - V. 103-104, l. SPEC.. - P. 387-394.

ISSN:

01677322

Type:

Conference Paper

Abstract:

The chloro and oxy-chloro complex ions of vanadium, containing the metal in different oxidation states (II, III, IV and V), were investigated in the melts NaCl-CsCl (at 550 - 700 °C) and NaCl-KCl (at 680 - 980 °C) under a variety of conditions. Melts were examined using electronic absorption spectroscopy between 4,000 and 33,000 cm-1. Anodic dissolution of vanadium was studied in NaCl-KCl melts at various anodic current densities. Vanadium dissolves, forming V(II) ions, at current densities of 100-150 mA cm-2; increasing the current density above ca. 340 mA cm-2 leads to the formation of predominantly V(III) species. Reactions of vanadium metal and vanadium oxides (V2O3 and V2O4) with hydrogen chloride or chlorine were followed by in situ spectroscopy measurements. Depending on the experimental conditions, a range of vanadium chloro- and oxychloro-complexes was formed. Reaction of the V(III) chloro-complex with oxygen leads to the formation of VO(II) complexions. Preliminary results indicate that the V(IV) chloro-complex, VCl6 2-, can be formed by oxidising VCl6 3- with chlorine. Vanadium(V) oxide reacts with hydrogen chloride in NaCl-KCl melts to form an oxygen-containing complex of V(III). Direct dissolution of V2O5 in NaCl-KCl melts yields sodium polyvanadate, NaV6O15. © 2003 Elsevier Science B.V. All rights reserved.

Author keywords:

Alkali metal chloride melts; Chlorination; Electronic spectroscopy; Vanadium; Vanadium chlorides; Vanadium oxides

Index keywords:

Absorption spectroscopy; Anodic oxidation; Chlorination; Current density; Dissolution; Electron spectroscopy; Fused salts; Melting; Electronic absorption spectroscopy; Vanadium compounds

DOI:

10.1016/S0167-7322(02)00156-3

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037364866&doi=10.1016%2fS0167-7322%2802%2900156-3&partnerID=40&md5=378888388ac182557deae2e980845adc

Соавторы в МНС:

Другие поля

Поле	Значение
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037364866&doi=10.1016%2fS0167-7322%2802%2900156-3&partnerID=40&md5=378888388ac182557deae2e980845adc
Affiliations	Department of Rare Metals, Physico-Engineering Faculty, Ural State Technical University, Ekaterinburg 620002, Russian Federation; Centre for Radiochemistry Research, Department of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom; Institute of Metallurgy, Russian Academy of Sciences, Ural Branch, Ekaterinburg 620016, Russian Federation; School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom; British Nuclear Fuels plc, Sellafield R and D, Seascale, Cumbria CA20 1PG, United Kingdom
Author Keywords	Alkali metal chloride melts; Chlorination; Electronic spectroscopy; Vanadium; Vanadium chlorides; Vanadium oxides
References	Harrington, G., Sundheim, B.R., (1960) Ann. N. Y. Acad. Sci., 79, p. 950; Gruen, D.M., McBeth, R.L., (1962) J. Phys. Chem., 66, p. 57; Gruen, D.M., McBeth, R.L., (1963) Pure Appl. Chem., 6, p. 23; Molina, R., (1961) Bull. Soc. Chim. France, p. 301; Maslov, S.V., Vasin, B.D., (1993) Rasplavy, 3, p. 66; Griffiths, T.R., (1984) Molten Salt Techniques, 2, pp. 79-135. , Ed. R. J. Gale and D. C. Lovering, Plenum, New York
Correspondence Address	Griffiths, T.R.; School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom; email: T.R.Griffiths@chem.leeds.ac.uk
CODEN	JMLID
Language of Original Document	English
Abbreviated Source Title	J Mol Liq
Source	Scopus